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a600e5ce RM |
1 | /* Catastrophic failure reports. Linux version. |
2 | Copyright (C) 1993-2013 Free Software Foundation, Inc. | |
0d5f4929 UD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
0d5f4929 | 18 | |
1327439f | 19 | #include <errno.h> |
61a4f6fb | 20 | #include <execinfo.h> |
a600e5ce | 21 | #include <fcntl.h> |
1327439f | 22 | #include <not-cancel.h> |
a600e5ce RM |
23 | #include <sys/mman.h> |
24 | #include <sys/uio.h> | |
1327439f | 25 | |
a600e5ce RM |
26 | static bool |
27 | writev_for_fatal (int fd, const struct iovec *iov, size_t niov, size_t total) | |
1327439f | 28 | { |
a600e5ce RM |
29 | INTERNAL_SYSCALL_DECL (err); |
30 | ssize_t cnt; | |
31 | do | |
32 | cnt = INTERNAL_SYSCALL (writev, err, 3, fd, iov, niov); | |
33 | while (INTERNAL_SYSCALL_ERROR_P (cnt, err) | |
34 | && INTERNAL_SYSCALL_ERRNO (cnt, err) == EINTR); | |
35 | return cnt == total; | |
36 | } | |
37 | #define WRITEV_FOR_FATAL writev_for_fatal | |
1327439f | 38 | |
a600e5ce RM |
39 | static void |
40 | backtrace_and_maps (int do_abort, bool written, int fd) | |
0d5f4929 | 41 | { |
a600e5ce | 42 | if (do_abort > 1 && written) |
553cc5f9 | 43 | { |
a600e5ce | 44 | void *addrs[64]; |
553cc5f9 | 45 | #define naddrs (sizeof (addrs) / sizeof (addrs[0])) |
a600e5ce RM |
46 | int n = __backtrace (addrs, naddrs); |
47 | if (n > 2) | |
48 | { | |
553cc5f9 | 49 | #define strnsize(str) str, strlen (str) |
262b5730 | 50 | #define writestr(str) write_not_cancel (fd, str) |
a600e5ce RM |
51 | writestr (strnsize ("======= Backtrace: =========\n")); |
52 | __backtrace_symbols_fd (addrs + 1, n - 1, fd); | |
53 | ||
54 | writestr (strnsize ("======= Memory map: ========\n")); | |
55 | int fd2 = open_not_cancel_2 ("/proc/self/maps", O_RDONLY); | |
56 | char buf[1024]; | |
57 | ssize_t n2; | |
58 | while ((n2 = read_not_cancel (fd2, buf, sizeof (buf))) > 0) | |
59 | if (write_not_cancel (fd, buf, n2) != n2) | |
60 | break; | |
61 | close_not_cancel_no_status (fd2); | |
62 | } | |
553cc5f9 | 63 | } |
1327439f | 64 | } |
a600e5ce | 65 | #define BEFORE_ABORT backtrace_and_maps |
1327439f | 66 | |
a600e5ce | 67 | #include <sysdeps/posix/libc_fatal.c> |